[ubuntu] Install Compendium in Ubuntu

I am relatively new to Ubuntu but have been doing all I can to learn using the available documentation, but have run up against a problem.
I am trying to install Compendium, and it seems straigtforward:
http://compendium.open.ac.uk/institu...re/ReadMe.html

"Once you have downloaded the relevant .tar file from the compendiuminstitute.org website, simply unpack it.You can run Compendium by navigating to the Compendium directory and typing: ./compendium.sh"

Reality is rather different.

I've been trying to follow the steps set out here: https://help.ubuntu.com/community/CompilingEasyHowTo


But can't get step 2 to work.

Any advice would be gratefully appreciated.

Thanks